Alternating-current and direct-current integrated charging system

Abstract

An alternating-current and direct-current integrated charging system, comprising an alternating-current charging device or a direct-current charging device, an adapter plug (1), a direct-current charging socket, a cable and a traction battery, wherein the adapter plug (1) is detachably and electrically connected to the direct-current charging socket, and an alternating-current interface (11) of the adapter plug (1) is connected to the alternating-current charging device or a direct-current interface (12) of the adapter plug (1) is connected to the direct-current charging device; an output end of an alternating-current terminal is connected to an output end of a direct-current terminal to form a common output end, and the common output end is sequentially connected to the direct-current charging socket, the cable and the traction battery; the adapter plug (1) is integrated with a control module, a current identification module, a direct-current management unit and an alternating-current-to-direct-current conversion management unit; and the control module is configured to execute an alternating-current charging mode or a direct-current charging mode on the basis of a current waveform acquired by the current identification module.

Description

An AC / DC integrated charging system

[0001] Related applications

[0002] This application claims priority to the Chinese utility model patent application number 202322294817.1 filed on August 25, 2023, and cites the entire contents disclosed in the above patent application as part of this application. Technical Field

[0003] The present disclosure relates to the technical field of automobile connectors, and in particular to an AC / DC integrated charging system. Background Art

[0004] With the rapid development of new energy technologies, electric vehicles are becoming increasingly popular. Currently, charging sockets on the market have a wide range of charging interface standards, including national, European, and American standards. These standards also include DC and AC charging interfaces. Therefore, to accommodate these multiple charging interfaces, electric vehicles typically have integrated AC and DC interfaces. These interfaces are connected to the charger and the vehicle battery via cables. Due to the high charging current, the cable diameter of the charging harness is also relatively thick, and the number of accessories used to assist assembly is also high, significantly increasing the weight and cost of the harness. Therefore, a new technical solution is urgently needed to address the above issues.

[0005] Summary of the Invention

[0006] The purpose of the present disclosure is to provide an integrated AC / DC charging system that can reduce the types of vehicle charging interfaces, reduce the amount of charging wiring harnesses and the number of accessories on the wiring harnesses, and reduce costs.

[0007] The present disclosure provides an AC / DC integrated charging system, comprising an AC charging device or a DC charging device, a conversion plug, a DC charging base, a cable, and a power battery;

[0008] The conversion plug is detachably connected to the DC charging station.

[0009] The conversion plug includes an AC interface and a DC interface. The AC interface of the conversion plug is connected to the output terminal of the AC charging device or the DC interface of the conversion plug is connected to the output terminal of the DC charging device. The AC interface is provided with at least one AC terminal for receiving AC power, and the DC interface is provided with at least one DC terminal for receiving DC power. The output terminals of the AC terminal and the DC terminal are respectively connected to form a common output terminal, which is connected to the input terminal of the DC charging base. The output terminal of the DC charging base is connected to the power battery input terminal via a cable.

[0010] The conversion plug integrates a control module, a current identification module, a DC management unit and an AC to DC management unit.

[0011] The control module is configured to obtain the current waveform from the current identification module and execute the AC charging mode or the DC charging mode according to the current waveform, wherein the AC charging mode or the DC charging mode is to supply power to the power battery through the AC to DC management unit or to supply power to the power battery through the DC management unit.

[0012] Exemplarily, the AC terminal includes an AC negative terminal, an AC PE terminal and an AC positive terminal, and the DC terminal includes a DC negative terminal, a DC PE terminal and a DC positive terminal. The output end of the AC positive terminal is transferred to the output end of the DC positive terminal through a first transfer structure, the output end of the AC negative terminal is transferred to the output end of the DC negative terminal through a second transfer structure, and the output end of the AC PE terminal is transferred to the output end of the DC PE terminal through a third transfer structure. The output end of the DC positive terminal, the output end of the DC negative terminal and the output end of the DC PE terminal together form a common output end.

[0013] Illustratively, the first adapter structure, the second adapter structure, and the third adapter structure are any one or a combination of adapter bars or adapter lines.

[0014] Exemplarily, the AC terminal includes an AC negative terminal, an AC PE terminal and an AC positive terminal, the DC terminal includes a DC negative terminal, a DC PE terminal and a DC positive terminal, the output end of the AC positive terminal and the output end of the DC positive terminal are connected through a first output structure, the output end of the AC negative terminal and the output end of the DC negative terminal are connected through a second output structure, the output end of the AC PE terminal and the DC PE terminal are connected through a third output structure, and the first output structure, the second output structure and the third output structure together form a common output end.

[0015] Exemplarily, the first output structure, the second output structure, and the third output structure are any one or a combination of adapter bars or adapter cables.

[0016] Exemplarily, the common output end is connected to the input end of the current identification module, the output end of the current identification module is connected to the input end of the control module, the DC management unit is connected in parallel with the AC-to-DC management unit, the output end of the control module is respectively connected to the input ends of the DC management unit and the AC-to-DC management unit, and the output end of the DC management unit or the output end of the AC-to-DC management unit is connected to the input end of the DC charging socket.

[0017] Exemplarily, a high-voltage distribution unit and a BMS are connected in series between the DC charging station and the power battery.

[0018] Exemplarily, the output end of the high-voltage distribution unit is also connected to the automobile microcontroller, DC converter, heater and air-conditioning system, and the output end of the high-voltage distribution unit is connected to the automobile microcontroller, DC converter, heater and air-conditioning system through a busbar and a wiring harness.

[0019] Exemplarily, the AC-DC management unit is integrated with a rectifier and converts the AC power output from the common end into DC power through the rectifier.

[0020] Exemplarily, the DC management unit includes a step-down circuit and a step-up circuit.

[0021] Beneficial effects of the present disclosure:

[0022] The output end of the AC terminal in the AC interface of the conversion plug of this design and the output end of the DC terminal in the DC interface are connected to form a common output end. The common output end is connected to the DC charging base and the power battery in sequence through cables. The output cables of the AC terminal output end or the DC terminal output end are eliminated. Only the cables are connected at the common output end. The AC and DC are connected on the same line. The AC interface of the charging base is eliminated, and only the DC charging base is used. The amount of charging harness and the number of all harness accessories such as cable ties, tapes, and brackets used for the harness are reduced, greatly reducing costs.

[0023] Moreover, the conversion plug integrates a control module, a current identification module, a DC management unit and an AC-DC management unit. The conversion plug can obtain the current waveform of the common output end according to the current identification module and execute AC charging mode or DC charging mode. The conversion plug has a two-in-one charging management function of DC charging management and AC charging management.

[0024] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0026] FIG1 is a block diagram showing the structural principle of the AC / DC integrated charging system disclosed herein.

[0027] FIG2 is a connection diagram of the AC / DC integrated charging system disclosed in the present invention.

[0028] FIG3 is a schematic structural diagram of a common output terminal formed by connecting the output end of the AC terminal and the output end of the DC terminal of the present invention.

[0029] FIG4 is another structural schematic diagram showing that the output end of the AC terminal and the output end of the DC terminal of the present disclosure are respectively connected to form a common output end. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0033] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0034] The AC / DC integrated charging system, as shown in Figures 1 to 4, includes an AC charging device or a DC charging device, a conversion plug 1, a DC charging base, a cable, and a power battery;

[0035] The conversion plug 1 is detachably connected to the DC charging station.

[0036] The conversion plug 1 includes an AC interface 11 and a DC interface 12. The AC interface 11 of the conversion plug 1 is connected to the output terminal of the AC charging device, or the DC interface 12 of the conversion plug 1 is connected to the output terminal of the DC charging device. The AC interface 11 is provided with at least one AC terminal for receiving AC power, and the DC interface 12 is provided with at least one DC terminal for receiving DC power. The output terminals of the AC terminal and the DC terminal are respectively connected to form a common output terminal, which is connected to the input terminal of the DC charging cradle. The output terminal of the DC charging cradle is connected to the power battery input terminal via a cable.

[0037] The conversion plug 1 integrates a control module, a current identification module, a DC management unit and an AC to DC management unit.

[0038] The control module is configured to obtain a current waveform from the current identification module and execute an AC charging mode or a DC charging mode based on the current waveform. The AC charging mode or the DC charging mode involves powering the power battery via the AC / DC management unit or the DC management unit. For example, the AC charging mode involves powering the power battery via the AC / DC management unit. The DC charging mode involves powering the power battery via the DC management unit.

[0039] With the rapid development of new energy technologies, electric vehicles are becoming increasingly popular. Currently, charging sockets on the market have a variety of charging interface standards, including national, European, and American standards, as well as DC and AC charging interfaces. Therefore, to accommodate these multiple charging interfaces, electric vehicles typically have integrated AC and DC interfaces 11 and 12, respectively, connecting the charger to the vehicle battery via cables. Due to the high charging current, the charging harness cable diameter is also relatively thick, and the number of accessories used to assist assembly is also high, significantly increasing the weight and cost of the charging harness.

[0040] The output end of the AC terminal in the AC interface 11 of the conversion plug 1 of the present disclosure and the output end of the DC terminal in the DC interface 12 are respectively connected to form a common output end. The common output end is connected to the DC charging base and the power battery in sequence through cables. The output cables of the AC terminal output end or the DC terminal output end are eliminated. The cables are connected only at the common output end. The AC and DC are connected on the same line. The AC interface 11 of the charging base is eliminated, and only the DC charging base is used. The amount of charging harness and the number of all harness accessories such as cable ties, tapes, and brackets used for the harness are reduced, which greatly reduces the cost and also reduces the weight and space of the charging harness, which is conducive to lightweighting of the equipment.

[0041] Moreover, the conversion plug 1 integrates a control module, a current identification module, a DC management unit and an AC-DC management unit. The conversion plug 1 can obtain the current waveform of the common output end according to the current identification module and execute AC charging mode or DC charging mode. The conversion plug 1 has a two-in-one charging management function of DC charging management and AC charging management.

[0042] In some embodiments, the output end of the DC charging device can be directly connected to a DC charging base to supply power to the power battery through the DC charging base.

[0043] In some embodiments, as shown in Figure 3, the AC terminal includes an AC negative terminal 112, an AC PE terminal 113 and an AC positive terminal 111, and the DC terminal includes a DC negative terminal 122, a DC PE terminal 123 and a DC positive terminal 121. The output end of the AC positive terminal 111 is transferred to the output end of the DC positive terminal 121 through a first transfer structure 13, the output end of the AC negative terminal 112 is transferred to the output end of the DC negative terminal 122 through a second transfer structure 14, and the output end of the AC PE terminal 113 is transferred to the output end of the DC PE terminal 123 through a third transfer structure 15. The output end of the DC positive terminal 121, the output end of the DC negative terminal 122 and the output end of the DC PE terminal 123 together form a common output end.

[0044] The output end of the AC terminal is transferred to the output end of the DC terminal through a transfer structure. Only the output end of the DC positive terminal 121, the output end of the DC negative terminal 122 and the output end of the DC PE terminal 123 of the DC terminal form a common output end, which is connected to the on-board charger through a cable. The output end of the on-board charger is connected to the power battery. This can reduce the number of AC cables connected to the output end of the AC terminal and all accessories such as cable ties, tapes, brackets, etc. used for the cables, thereby greatly reducing costs.

[0045] In some embodiments, the first adapter structure 13 , the second adapter structure 14 , and the third adapter structure 15 are any one or a combination of adapter bars or adapter wires.

[0046] The first transfer structure 13, the second transfer structure 14 and the third transfer structure 15 all use conductive transfer bars or transfer wires.

[0047] The transfer bar can be a copper bar or an aluminum bar. The copper bar, also known as the copper busbar or copper busbar, is made of copper and has a long conductor with a rectangular or chamfered (rounded) rectangular cross-section (generally rounded copper bars are used to avoid tip discharge). It is a high-current conductive product that plays the role of transmitting current and electrical connection in the circuit.

[0048] Aluminum busbar: A long aluminum product with a rectangular cross-section made of aluminum or aluminum alloy, sometimes also called a busbar.

[0049] The adapter cable is a conductive cable used to connect the conductive components between the AC terminal and the DC terminal.

[0050] In some embodiments, as shown in Figures 3 and 4, the AC terminal includes an AC negative terminal 112, an AC PE terminal 113 and an AC positive terminal 111, and the DC terminal includes a DC negative terminal 122, a DC PE terminal 123 and a DC positive terminal 121. The output end of the AC positive terminal 111 and the output end of the DC positive terminal 121 are connected through a first output structure 16, the output end of the AC negative terminal 112 and the output end of the DC negative terminal 122 are connected through a second output structure 17, and the output end of the AC PE terminal 113 and the DC PE terminal 123 are connected through a third output structure 18. The first output structure 16, the second output structure 17 and the third output structure 18 together form a common output end.

[0051] The output end of the AC terminal and the output end of the DC terminal are connected through the first output structure 16, the second output structure 17 and the third output structure 18. The first output structure 16, the second output structure 17 and the third output structure 18 together form a common output end, which is then connected to the on-board charger through a cable. The output end of the on-board charger is connected to the power battery, which can reduce the number of cables connected to the output ends of the AC terminal or the DC terminal and all accessories such as cable ties, tapes, brackets, etc. used for the cables, thereby greatly reducing costs.

[0052] In some embodiments, the first output structure 16 , the second output structure 17 , and the third output structure 18 are any one or a combination of patch cords or patch cables.

[0053] The first output structure 16, the second output structure 17 and the third output structure 18 all use conductive adapter bars or adapter wires.

[0054] The transfer bar can be a copper bar or an aluminum bar. The copper bar, also known as the copper busbar or copper busbar, is made of copper and has a long conductor with a rectangular or chamfered (rounded) rectangular cross-section (generally rounded copper bars are used to avoid tip discharge). It is a high-current conductive product that plays the role of transmitting current and electrical connection in the circuit.

[0055] Aluminum busbar: A long aluminum product with a rectangular cross-section made of aluminum or aluminum alloy, sometimes also called a busbar.

[0056] The adapter cable is a conductive cable used to connect the conductive components between the AC terminal and the DC terminal.

[0057] In some embodiments, the common output end is connected to the input end of the current identification module, the output end of the current identification module is connected to the input end of the control module, the DC management unit is connected in parallel with the AC-to-DC management unit, the output end of the control module is respectively connected to the input ends of the DC management unit and the AC-to-DC management unit, and the output end of the DC management unit or the output end of the AC-to-DC management unit is connected to the input end of the DC charging stand.

[0058] It can be understood as follows: the current identification module identifies the current waveform of the common output end, and the control module controls the charging gun to execute the charging mode according to the current waveform. If it is an AC waveform, the power battery is charged through the AC to DC management unit; if it is a DC waveform, the power battery is charged through the DC management unit.

[0059] In some embodiments, a high-voltage distribution unit and a BMS are connected in series between the DC charging station and the power battery.

[0060] The high-voltage distribution unit is a control unit that distributes power battery energy and is one of the key components of electric vehicles. It mainly plays the role of power distribution and short-circuit overload protection, and provides power to the power battery and on-board electrical devices.

[0061] A BMS (Battery Management System) is a battery management system. Its primary function is to intelligently manage and maintain individual battery cells, prevent overcharging and over-discharging, extend battery life, and monitor battery status. As the battery management system for electric vehicles, the BMS is the crucial link between the onboard power battery and the electric vehicle. The BMS collects, processes, and stores important information about the battery pack's operation in real time, exchanging information with external devices such as the vehicle controller. This information addresses key issues in lithium-ion battery systems, including safety, availability, usability, and service life.

[0062] In some embodiments, the output end of the high-voltage distribution unit is also connected to the automobile microcontroller, DC converter, heater and air-conditioning system, and the output end of the high-voltage distribution unit is connected to the automobile microcontroller, DC converter, heater and air-conditioning system through a busbar and a wiring harness.

[0063] The high-voltage distribution unit can effectively distribute the power of the power battery to the vehicle microcontroller, DC converter, heater and air-conditioning system, thereby achieving efficient arrangement of electricity use. The high-voltage distribution unit connects the vehicle microcontroller, DC converter, heater and air-conditioning system through the busbar (busbar is an electronic component, which can be copper or aluminum. It is an important component of electronic equipment and is used to connect and transmit current and signals. The surface is insulated and its main function is to serve as a conductor) and wiring harness, providing charging control for new energy vehicle electrical appliances and monitoring the operation of the electrical system.

[0064] In some embodiments, the AC-DC management unit is integrated with a rectifier and converts the AC power output from the common end into DC power through the rectifier.

[0065] The rectifier integrated into the AC charge management unit is an electrical device that converts alternating current, which periodically reverses direction, into direct current, which flows in only one direction.

[0066] In some embodiments, the DC management unit includes a buck circuit and a boost circuit.

[0067] The DC management unit can convert the electric energy at the public output end into the preset required electric energy required by the power battery through the step-down circuit and the step-up circuit, and then supply the preset required electric energy to the power battery through the DC charging station.

[0068] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. An AC / DC integrated charging system, characterized in that: include: AC charging equipment or DC charging equipment, conversion plug, DC charging station, cable, and power battery; The conversion plug is detachably electrically connected to the DC charging socket. The conversion plug includes an AC interface and a DC interface, the AC interface of the conversion plug is connected to the output end of the AC charging device or the DC interface of the conversion plug is connected to the output end of the DC charging device, the AC interface is provided with at least one AC terminal for connecting to AC power, and the DC interface is provided with at least one DC terminal for connecting to DC power, the output end of the AC terminal and the output end of the DC terminal are respectively connected to form a common output end, the common output end is connected to the input end of the DC charging seat, and the output end of the DC charging seat is connected to the power battery input end through the cable; The conversion plug integrates a control module, a current identification module, a DC management unit and an AC to DC management unit. The control module is configured to obtain a current waveform from the current identification module and execute an AC charging mode or a DC charging mode according to the current waveform, wherein the AC charging mode or the DC charging mode is to supply power to the power battery through the AC to DC management unit or to supply power to the power battery through the DC management unit.

2. The AC / DC integrated charging system according to claim 1, characterized in that: The AC terminal includes an AC negative terminal, an AC PE terminal and an AC positive terminal, and the DC terminal includes a DC negative terminal, a DC PE terminal and a DC positive terminal. The output end of the AC positive terminal is transferred to the output end of the DC positive terminal through a first transfer structure, the output end of the AC negative terminal is transferred to the output end of the DC negative terminal through a second transfer structure, the output end of the AC PE terminal is transferred to the output end of the DC PE terminal through a third transfer structure, and the output end of the DC positive terminal, the output end of the DC negative terminal and the output end of the DC PE terminal together form the common output end.

3. The AC / DC integrated charging system according to claim 2, characterized in that: The first adapter structure, the second adapter structure and the third adapter structure are any one or a combination of adapter bars or adapter lines.

4. The AC / DC integrated charging system according to claim 1, characterized in that: The AC terminal includes an AC negative terminal, an AC PE terminal and an AC positive terminal, and the DC terminal includes a DC negative terminal, a DC PE terminal and a DC positive terminal. The output end of the AC positive terminal and the output end of the DC positive terminal are connected through a first output structure, the output end of the AC negative terminal and the output end of the DC negative terminal are connected through a second output structure, the output end of the AC PE terminal and the DC PE terminal are connected through a third output structure, and the first output structure, the second output structure and the third output structure together form the common output end.

5. The AC / DC integrated charging system according to claim 4, characterized in that: The first output structure, the second output structure and the third output structure are any one or a combination of adapter bars or adapter wires.

6. The AC / DC integrated charging system according to claim 1, characterized in that: The common output end is connected to the input end of the current identification module, the output end of the current identification module is connected to the input end of the control module, the DC management unit is connected in parallel with the AC-to-DC management unit, the output end of the control module is respectively connected to the input ends of the DC management unit and the AC-to-DC management unit, and the output end of the DC management unit or the output end of the AC-to-DC management unit is connected to the input end of the DC charging socket.

7. The AC / DC integrated charging system according to claim 1, characterized in that: A high voltage distribution unit and a BMS are connected in series between the DC charging station and the power battery.

8. The AC / DC integrated charging system according to claim 7, characterized in that: The output end of the high-voltage distribution unit is also connected to the automobile microcontroller, the DC converter, the heater and the air-conditioning system. The output end of the high-voltage distribution unit is connected to the automobile microcontroller, the DC converter, the heater and the air-conditioning system through a busbar and a wiring harness.

9. The AC / DC integrated charging system according to claim 1, characterized in that: The AC-to-DC management unit is integrated with a rectifier and converts the AC power output from the common output terminal into DC power through the rectifier.

10. The AC / DC integrated charging system according to claim 1, characterized in that: The DC management unit includes a step-down circuit and a step-up circuit.

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